Arachnids, known as spiders, are feared by many humans. We have learned to fear spiders and their bites from movies, society and family. People conclude spider bites or stings are extreemly painful and cause significant harm to humans. Like other insect bites, some spider bites may be harmless but there are a number of spiders and their harmful spider bites that we should be aware of.

In Northern America there are six known spider species which inflict certain harm to people. These kinds of spiders include Black Widow Spiders, Sac Spiders, Brown Recluse Spiders, Brown Widow Spiders, Red-Legged Widow Spiders, and Varied Widow Spiders. The majority of these poisons spiders are females and are known by their dangerous bites. In Australia, the notorious Funnel-Web and Red Back Spiders deliver a painful venomous bite that sends 1000s to the hospital every year. Although death from these spiders, and others spiders happen in only very rare cases, treatment must be immediate to prevent secondary infection from these spider bites.

North American venomous spiders and their bites:

• Black Widow Spider Bites: You can easily spot a femal black widow with a red hourglass mark at its black belly. The female black widow that gives the more dangerous bite. Its bite may be compared with that of a pinprick but may lead to faint fang red marks and cause swelling of the skin. Within hours, the victim may experience stiffness, swelling and intense pain. Black Widow bites may produce other more severe symptoms - fever, chills, nausea, and severe abdominal pain. If you experience significant swelling, pain, nausea, feel faint or spike a fever, seek medical attention immediately. More information on Black Widow Spiders.
   
• Brown Recluse Spider Bites: The female Black Widow Spider has an hourglass on its belly as its mark and the Brown Recluse Spider has a violin-shaped distinction on the top of its body. Brown Recluse Spiders produce only a mild bite. Liquid blisters may appear at the bitten site and eventually descend to deep swollen tissue around the spider bite site. This may extend to entire limbs or body areas. Brown Recluse Spider bites can cause mild fever or nausea, however death only results in very rare occasions with children. Brown Recluse Spiders are considered more dangerous than Black Widow Spiders. More information on Brown Recluse Spiders.
  
  
• Hobo Spiders Bites: Tegenaria agretis is the scientific name for the common Hobo Spider. This arachnid is a European settler has taken up residence in the United Stateshas and is considered poisonous. Hobo Spiders are also commonly named the Aggressive House Spider, Northwestern Brown Spider, and rarely called Walckenaer Spider. To clearly distinguish the spider's name among others, the American Arachnological Society has recognized "hobo spider" as its certified name. The named "hobo" is associated with the spider's migrating to far cities via railways. Hobo Spiders are know to deliver a painful non-lethal spider bite. More information on Hobo Spiders.
  
  
• Sac Spider Bites: Originally from Ohio, Sac Spiders are common in households. They enter the homes to look for insects as their prey. Naturally, Sac Spiders do not attack unless provoked or trapped. Spider bites occur usually at night because of the nocturnal nature of Sac Spiders. Although non-toxic to humans, bites of Sac Spider can cause damage to the tissue and may leave a large open wound leading to secondary infection.

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Spider Bites Medical Attention

Since spider bites can be fatal, it is highly recommended that you seek immediate medical attention after any spider bite that accompanies fever, nausea, shortness of breath, breathing difficulty, significant swelling, pain, or stiffness to the body. Poisonous spider bites, like the Black Widow or Brown Recluse Spiders, antivenom treatment may be necessary. Antivenom medication must be administered durning early symptom stages for Brown Recluse Spider bites in order for the treatment to be effective. Always consult your physician regarding any medication or treatment.

Spider Bites Treatments

Soap and warm water is the first basic first aid step for insect bites, which is also appropriate for spider bites. Cold compresses are effective in alleviating swelling, redness or limb stiffness surrounding the spider bite site. Over-the-counter medication may be taken to control spider bite symptoms - 20 to 50 mg of diphenhydramine will reduce spider bite itchiung. Follow dosing instructions carefully to avoid an overdose. or patients who may suffer pain due to spider bites, 1 to 2 tablets of acetaminophen wilo ease painful discomfort.

Do's and Don'ts of spider bites:

• Do not take antibiotics unless the bite appears to be infected and your doctor has prescribed them. It has proven that they do not really produce a remedial effect on spider bites unless they have a bacterial infection.
• Do not take ibuprofen, naproxen, or aspirin or other over-the-counter medication to control symptoms.
• Do not try to dissect or open a wound as it may lead to further infection. Avoid scratching bites.
• Do not ignor more severe spider bite symptoms that may indicate an infection. Rather consult your physician as some bites need immediate medical care to prevent further complications.
• Do seek immediate medical attention if you experience a severe spider bite reaction: fever, nausea, shortness of breath, breathing difficulty, significant swelling, pain, or stiffness to the body.